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Finding the Fourth Proportional to 137.18, 206.79 and 135.96

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Solution

The fourth proportional to 137.18, 206.79 and 135.96 is: 204.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.18 : 206.79 = 135.96 : x
  2. Step 2: Convert to fraction form
    137.18/206.79 = 135.96/x
  3. Step 3: Cross multiply
    137.18x = 206.79 × 135.96
  4. Step 4: Simplify right side
    137.18x = 28,115.17
  5. Step 5: Solve for x
    x = 28,115.17/137.18
  6. Step 6: Final answer
    x = 204.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.